Finding the Fourth Proportional to 2,359.50, 3,256.18 and 1,311.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,359.50 : 3,256.18 = 1,311.63 : x
2. Step 2: Convert to fraction form
   2,359.50/3,256.18 = 1,311.63/x
3. Step 3: Cross multiply
   2,359.50x = 3,256.18 × 1,311.63
4. Step 4: Simplify right side
   2,359.50x = 4,270,900.09
5. Step 5: Solve for x
   x = 4,270,900.09/2,359.50
6. Step 6: Final answer
   x = 1,810.09